SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 CW1

2020 CW1

2020 CW1 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.664 AU once every 2.15 yr.

Amor Observations: 21
Orbital Period · P
2.15 yr
v(q)
32.4 km/s
v(Q)
16.5 km/s
Diameter · ≈
0.1 km
TJ
4.18
Eccentricity · e
0.3252

Orbit and dynamics

Between its closest point (1.123 AU) and its farthest (2.205 AU), the heliocentric distance changes by 1.082 AU over every revolution.

One full revolution takes 2.15 yr (784 days), computed from the semi-major axis of 1.664 AU.

An eccentricity of 0.325 makes the orbit moderately elongated.

The orbital plane is tilted 10.57° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.4 km/s at perihelion and falls to 16.5 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 22.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

Astrometry from 21 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6344 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
1.664 AU
Eccentricity
0.3252
Perihelion
1.123 AU
Aphelion
2.205133 AU
Inclination
10.57°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
346.99°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2035-Feb-27 09:08 0.161370 AU
24140655 km
6.10 km/s
2050-Feb-25 03:36 0.192737 AU
28833045 km
8.31 km/s
2065-Feb-23 18:37 0.331781 AU
49633752 km
12.07 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
22.7

Orbit Quality

RMS
0.63436
Condition
6
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.